feat: isolate docker networks and add cyt-pi remote node config

- Refactor all 12 compose stacks to use isolated networks with Traefik as the hub
- Add openclaw-ssh sidecar to ai stack for reverse tunneling (port 2425)
- Add sshnode entrypoint to Traefik configuration
- Add cyt-pi host configuration for Pi Zero 2 W (headless)
- Include kismet and target_detector_cli services for remote Wi-Fi monitoring
- Add reverse SSH tunnel service via autossh

lib/keys.nix

@@ -6,7 +6,7 @@
       gitea = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIN9tKezYidZglWBRI9/2I/cBGUUHj2dHY8rHXppYmf7F";
     };
     
-    n8n-worker = {
+    ai-worker = {
       main = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIAXeGtPPcsP2IYRQNvII41NVWhJsarEk8c4qxs/a5sXf";
     };
   };